Distribution of inclusions on surface of GH4169 ESR ingot
WANG Di1,2,3, YANG Shu-feng1,2, QU Jing-long3,4, DU Jin-hui3,4, AN Teng3,4, HUANG Yan-cheng5
1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials, Beijing 100083, China; 3. Beijing Central Iron and Steel Research Institute, Beijing 100081, China; 4. Beijing CISRI-GAONA Materials and Technology Co., Ltd., Beijing 100081, China; 5. Jiangyou Changcheng Special Steel Co.,Ltd., Pangang Group, Mianyang 621701, Sichuan, China
Abstract:Electroslag remelting is the middle link of the "triple" smelting process of the GH4169 superalloy. The surface quality of electroslag ingot is of great significance to improve the purity of consumable ingot. The surface quality can be improved by using an appropriate turning amount. Scanning electron microscopy with energy-dispersive spectroscopy,Image Pro Plus software,and JMatPro software were used to systematically explore the distribution of inclusions on the surface of the electroslag ingot,and to develop a more suitable turning range. The results showed that composite inclusions with Ti (C,N) and MgAl2O3 as the core were formed in the electroslag ingot. With the location of the sample gradually away from the edge of the ingot,the amount of inclusions was reduced from 5 233 to 3 684/mm2 and then stable fluctuation in the range of (3 650±30)/mm2;the average size distribution of inclusions was reduced from 7.7 to 4.9 μm and then stable fluctuation in the range of (4.3 ± 0.1) μm. According to the distribution of inclusions in the surface area,the suitable turning range of electroslag ingot is 18-24 mm. The results of industrial experiments show that the new cutting range can improve the surface quality of electroslag ingot after machining.
王迪, 杨树峰, 曲敬龙, 杜金辉, 安腾, 黄燕成. GH4169电渣重熔铸锭表层夹杂物分布规律[J]. 钢铁, 2021, 56(2): 155-161.
WANG Di, YANG Shu-feng, QU Jing-long, DU Jin-hui, AN Teng, HUANG Yan-cheng. Distribution of inclusions on surface of GH4169 ESR ingot[J]. Iron and Steel, 2021, 56(2): 155-161.
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